Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dca3a4cdc3579b…

MALICIOUS

PDF

70.2 KB Created: 2021-02-18 02:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 48e8eaa5511c378d56829d0fb3775ce8 SHA-1: 28997396b2c7a2ddb4aed2d8ca7e8fb726676056 SHA-256: 90dca3a4cdc3579ba40c27ea60ad7a9e6b5c76f02119b2779d15fe8b2d83b794
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/wb?keyword=troy%20bilt%20pony%20carburetor%20removal In PDF document text
    • http://nodozavi.iblogger.org/adani_green_energy_limited_annual_report.pdfIn PDF document text
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/liwani_wezipelufuni_bisufusifet.pdfIn PDF document text
    • http://samettemiz.xyz/anthem_ranger_javelin_guidecwh3j.pdfIn PDF document text
    • https://pawusavexamase.weebly.com/uploads/1/3/0/8/130813618/3296887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_5fd637fe25a91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489724/normal_5fcd0f1a18459.pdfIn PDF document text
    • http://kujazudoxiro.22web.org/61932883808.pdfIn PDF document text
    • http://fitit.space/el_viaje_del_heroe2bhyu.pdfIn PDF document text
    • http://hookup153.space/teach_online_without_a_degreewovbz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xiwaresijo.epizy.com/durga_mata_ke_bhajan_free.pdfIn PDF document text
    • http://dogolevoxameno.rf.gd/kundalini_meditation_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/59956893462.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/bilayer_formation_adsorption.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/d_d_lycanthrope_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/escaner_obdii_android.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D7 5152 bytes
SHA-256: 35a3025543c1d100678f74fad4ad872ca92fa78d41992d53d11a4a1c31c8ef88
font_01_sfnt_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 10232 bytes
SHA-256: fdc4c6e9538c55950c792a12d566ed2ade4decd2437d758b7453d9d54509afcf